In this level, you need to jump between large platforms, which is quite difficult to miss. That's why this level is pretty easy for most people.

If you want to use the Bunny, you can try to hop between the first few platforms and increase your speed. When it is hard to do this, use a high jump to skip a large part of the level. Continue to repeat the process until you beat this level.

As for the Runner, there isn't strategy, just do high jumps between platforms and look for landing space. Also remember to time your jumps.

As for the Child, repeat to jump, float and land. Since he is lightweight, it is possible that a jump can take you far away, letting you pass a large part of this level without breaking a sweat.